CN103711081A - Method for locating position of flange on upper end opening of skewback through coordinate correction method - Google Patents
Method for locating position of flange on upper end opening of skewback through coordinate correction method Download PDFInfo
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- CN103711081A CN103711081A CN201310730319.5A CN201310730319A CN103711081A CN 103711081 A CN103711081 A CN 103711081A CN 201310730319 A CN201310730319 A CN 201310730319A CN 103711081 A CN103711081 A CN 103711081A
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Abstract
The invention discloses a method for locating the position of a flange on an upper end opening of a skewback through a coordinate correction method. The method comprises the following steps that the intersection point of the calculated span of an arch bridge and the left end of a steel tube arch central parabola is used as a datum point of coordinate shifting; a plurality of points are marked along the circumference of the inner side of a skewback chord tube, the circumference of the inner side is evenly divided into multiple parts, and the points are the positions with rib plates welded; the three-dimensional coordinate values of the points on a tube opening are measured; according to the three-dimensional coordinate values of the measured points, the datum point is shifted along an X-axis and a Z-axis respectively, an X-axis shifting line and a Z-axis shifting line are obtained, the distance between the intersection point of the two shifting lines and the lower plane of the theoretical mounting position of the flange of the skewback is measured, and the distance is used as the actual height of the parts, stretching out of the tube opening of the skewback chord tube, of the rib plates welded at the measured points; the rib plates are welded according to the calculated actual height of the part, stretching out of the tube opening of the skewback chord tube, of each rib plate, and flanges are welded to the end faces of the rib plates. According to the method, the initial linear deviation of the steel tube arch bridge can be effectively adjusted, and the linear precision of a steel tube arch is guaranteed.
Description
Technical field
The present invention relates to the mounting technique of steel tube arch, relate in particular to a kind of method of utilizing flange position, arch springing upper port place, the legal position of coordinate modification.
Background technology
At present at Middle Line Project For Transferring Water From South To North first stage of the project general main canal of building, have many across canal road bridge, bridge bottom is concrete structure, and top is that tubular arch adopts rigid steel pipes concrete truss structure.Concrete-filled steel tubes arch bridge, as a kind of emerging arch bridge, takes full advantage of steel tube concrete soil material with it in recent years, has improved supporting capacity, and easy with the adaptability of bridge construction and construction, good looking appearance and obtained great development.
Arch springing is the basis that steel pipe arch bridge arc rib alignment is controlled, and the precision that during construction of arch springing sections location, install arch rib at its physical dimension position, the axis size of arch springing string pipe, longitudinal elevation angle etc. is most important.In across canal road bridge, the arch springing string pipe at steel pipe arch bridge two ends is to construct with together with beam portion concrete, owing to may occur arch springing string pipe port elevation deflection in concreting process, physical dimension position deviation etc., cause the initial linear deviation that occurs of steel pipe arch bridge, and then affect whole tubular arch installation quality.
Summary of the invention
The technical problem to be solved in the present invention is to construct together for the arch springing string Guan Yuliang portion concrete at steel pipe arch bridge two ends in prior art, in casting process, may there is arch springing string pipe port elevation deflection, thereby cause causing the initial linear defect that occurs deviation of steel pipe arch bridge, provide a kind of by regulating the setting height(from bottom) of arch springing string pipe inner reinforced plate to determine arch springing flange position, thereby adjust the initial linear deviation of steel pipe arch bridge, guarantee the method for utilizing flange position, arch springing upper port place, the legal position of coordinate modification of the linear precision of tubular arch.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method of utilizing flange position, arch springing upper port place, the legal position of coordinate modification is provided, comprises the following steps:
Using the calculating of arch bridge across the intersection point of footpath and tubular arch center parabola left end the reference point as coordinate offset;
Along arch springing string pipe inside circumference, mark a plurality of points, inside circumference is evenly divided into many parts, the position that those points are welding gusset;
Measure those in the D coordinates value of the mouth of pipe;
According to the D coordinates value of survey mark, reference point is offset respectively along X-axis and Z axis, obtain X-axis skew line and Z axis skew line, measure the intersection point of two skew lines to the distance of the theoretical installation site of arch springing flange lower plane, the actual height that this is stretched out to the arch springing string pipe mouth of pipe apart from gusset when this measurement point is welded gusset;
According to the every gusset calculating, stretch out the actual height welding gusset of the arch springing string pipe mouth of pipe, and at the end of many gussets welded flange.
In method of the present invention, a plurality of points that mark along arch springing string pipe inside circumference are by being marked when making arch springing string pipe.
In method of the present invention, the point marking along arch springing string pipe inside circumference is eight points, and inside circumference is evenly divided into eight parts.
In method of the present invention, measure those steps in the D coordinates value of the mouth of pipe and be specially on those aspects and be stained with measurement reflecting piece, and utilize those D coordinates value at the mouth of pipe of total station survey.
The beneficial effect that the present invention produces is: the present invention is by revising the coordinate of arch springing string pipe inner reinforced plate installation site, regulate the setting height(from bottom) of gusset, accurately locate arch springing flange position, thereby adjust the initial linear deviation of steel pipe arch bridge, guaranteed the installation accuracy of tubular arch.In addition, polylith gusset and the flange of mounting flange are set to loose mail, after adjusting at the scene, install, and have avoided flange position not to causing doing over again of arch springing string pipe inner reinforced plate welding, and the damage thus arch springing string pipe being caused.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is embodiment of the present invention steel pipe arch bridge schematic diagram;
Fig. 2 is the schematic diagram of embodiment of the present invention arch springing string pipe;
Fig. 3 is that embodiment of the present invention arch springing string pipe inner reinforced plate is installed distribution map;
Fig. 4 is that embodiment of the present invention arch springing string pipe inner reinforced plate is installed theoretical level figure;
Fig. 5 is embodiment of the present invention arch springing coordinate offset schematic diagram.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Polylith gusset and the flange of the present invention's mounting flange are set to loose mail, are only that the arch springing string Guan Yuliang portion concrete at steel pipe arch bridge two ends is constructed together, determine the location of arch springing flange at the scene by adjusting gusset in the setting height(from bottom) of arch springing string pipe.Can effectively adjust the initial linear deviation of steel pipe arch bridge, guarantee the linear precision of tubular arch.Contingent because flange position is to causing doing over again of arch springing string pipe inner reinforced plate welding when the present invention has avoided monobloc cast in prior art, and the damage thus arch springing string pipe being caused.
The embodiment of the present invention is utilized the method for flange position, arch springing upper port place, the legal position of coordinate modification, comprises the following steps:
1, determine the reference point in steel pipe arch bridge:
Fig. 1 is the plan of steel pipe arch bridge 1, and the calculating that AB line is steel pipe arch bridge is across footpath.
The reference point that calculating is coordinate offset across the intersection point A of footpath and tubular arch center parabola left end.
The theoretical altitude coordinates value of AB line is Z
0=146171mm.
2, the construction of steel pipe arch springing
As shown in Figure 2, upper left, lower-left, upper right, four of bottom rights arch springing string pipe 11 are divided in steel pipe arch springing everywhere.
Along arch springing string pipe inside circumference, mark a plurality of points in advance, inside circumference is evenly divided into many parts, the position that those points are welding gusset 3.In one embodiment of the invention, when produce in factory, 1., 2., 3., 4., 5., 6., 7., 8. each arch springing string pipe 11 is interior divides at 8 along even circumferential, 8 gussets 3 are installed, as shown in Figure 4 and Figure 5, gusset 3 vertically welds along steel pipe direction, and flange 5 is welded on gusset 3.As shown in Figure 4, the design vertical distance that 8 gussets stretch out the mouth of pipe is 190mm.
In a preferred embodiment of the present invention, can be stained with measurement reflecting piece at 8 points of arch springing string pipe, with total station survey, go out 8 points in the D coordinates value (X, Y, Z) of the mouth of pipe.
3, determining of gusset setting height(from bottom):
According to the D coordinates value of survey mark, reference point is offset respectively along X-axis and Z axis, obtain X-axis skew line and Z axis skew line, measure the intersection point of two skew lines to the distance of the theoretical installation site of arch springing flange lower plane, the actual height that this is stretched out to the arch springing string pipe mouth of pipe apart from gusset when this measurement point is welded gusset.
In the embodiment of the present invention, take steel pipe arch bridge upper left arch springing 2. the place of putting welding gusset be example explanation.Flange thickness is L(35) mm.
In Fig. 5, EF line is the lower plane of the theoretical installation site of arch springing flange.
2. the coordinate figure of putting gusset installation site by measuring upper left arch springing is (5580mm, 25730mm, 153095mm)
X-axis side-play amount: the A of take moves 5580mm along X axis right avertence as reference point, skew line is M line.
Y-axis side-play amount: be not offset.
Z axis side-play amount: take A as reference point is along being offset 153095mm-146171mm=6924mm in Z-axis direction, skew line is N line.
The intersection point of skew line M line and skew line N line is C point, and C point is upper left to the vertical distance CD of EF line and 2. puts the actual height that gusset stretches out the arch springing string pipe mouth of pipe, as shown in Figure 5.
In like manner, can show that other gussets stretch out the actual height of the mouth of pipe.
4, welding gusset
The actual height of stretching out the mouth of pipe above according to definite gusset is welded on gusset in arch springing string pipe, has determined the installation site of flange.Treat the assembled location positioning of first paragraph steel tube arch rib, with arch springing dock in advance errorless after, arch springing flange welding is fixing on the end face of gusset.
Other arch springings of this steel pipe arch bridge are all determined by this method.
To sum up, the present invention, by revising the coordinate of arch springing string pipe inner reinforced plate installation site, regulates the setting height(from bottom) of gusset, accurately locates arch springing flange position, thereby adjusts the initial linear deviation of steel pipe arch bridge, has guaranteed the installation accuracy of tubular arch.In addition, polylith gusset and the flange of mounting flange are set to loose mail, after adjusting at the scene, install, and have avoided flange position not to causing doing over again of arch springing string pipe inner reinforced plate welding, and the damage thus arch springing string pipe being caused.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (4)
1. a method of utilizing flange position, arch springing upper port place, the legal position of coordinate modification, is characterized in that, comprises the following steps:
Using the calculating of arch bridge across the intersection point of footpath and tubular arch center parabola left end the reference point as coordinate offset;
Along arch springing string pipe inside circumference, mark a plurality of points, inside circumference is evenly divided into many parts, the position that those points are welding gusset;
Measure those in the D coordinates value of the mouth of pipe;
According to the D coordinates value of survey mark, reference point is offset respectively along X-axis and Z axis, obtain X-axis skew line and Z axis skew line, measure the intersection point of two skew lines to the distance of the theoretical installation site of arch springing flange lower plane, the actual height that this is stretched out to the arch springing string pipe mouth of pipe apart from gusset when this measurement point is welded gusset;
According to the every gusset calculating, stretch out the actual height welding gusset of the arch springing string pipe mouth of pipe, and at the end of many gussets welded flange.
2. method according to claim 1, is characterized in that, a plurality of points that mark along arch springing string pipe inside circumference are by being marked when making arch springing string pipe.
3. method according to claim 2, is characterized in that, the point marking along arch springing string pipe inside circumference is eight points, and inside circumference is evenly divided into eight parts.
4. method according to claim 3, is characterized in that, measures those steps in the D coordinates value of the mouth of pipe and is specially on those aspects and is stained with measurement reflecting piece, and utilize those D coordinates value at the mouth of pipe of total station survey.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104532750A (en) * | 2014-12-22 | 2015-04-22 | 盈都桥梁钢构工程有限公司 | Construction method guaranteeing flatness of steel box arch foot flange plate |
| CN106480823A (en) * | 2015-12-24 | 2017-03-08 | 中铁二局集团有限公司 | Vaulted beam device and its localization method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104532750A (en) * | 2014-12-22 | 2015-04-22 | 盈都桥梁钢构工程有限公司 | Construction method guaranteeing flatness of steel box arch foot flange plate |
| CN104532750B (en) * | 2014-12-22 | 2016-06-08 | 盈都桥梁钢构工程有限公司 | A kind of guarantee steel case arch arch springing flanged plate flatness construction method |
| CN106480823A (en) * | 2015-12-24 | 2017-03-08 | 中铁二局集团有限公司 | Vaulted beam device and its localization method |
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